Nihonkoku Shoukan

Alt title: Japan Summons

If you're looking for manga similar to Nihonkoku Shoukan, you might like these titles.

GATE: Where the JSDF Fought

GATE: Where the JSDF Fought

On August 20XX, a gate suddenly appears in Tokyo's Ginza district, unleashing a portal where monsters, medieval knights and other fantasy beings come from another world and wreak havoc on Tokyo. The Japanese Defense Force take action against these monsters and push them back into the "Gate". Third Reconnaissance Team is dispatched to the "Special Region" lead by officer (and otaku) Touji Itami.

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Reasons you might like GATE: Where the JSDF Fought...

Grizz Grizz says...

Both these manga feature the JSDF taking on foes in another world!                                   

somebodywhoreads somebodywhoreads says...

In GATE - its a gate so worldwide politics are in play [as in bad things will happen if they try to take over and occupy the whole dimension]

In Nihonkoku - Japan is transported, and they have to play more aggressively because they have to import most of their resources from external countries, so they need to play god to set balance.

drjoga drjoga says...

In Gate a gate to the fantasy world appears in Japan and in Japan Summons, the entire country of Japan is summoned into another world.

Both involve JSDF fightigh in another world, but in Gate it also involve modern Earth's politics in addition to another world's politics.

The ego of modern military power, modern weapons, patriot, morals, human rights, war, politics.

GATE: Season 2 - Jieitai Kano Umi nite, Kaku Tatakeri (Light Novel)

GATE: Season 2 - Jieitai Kano Umi nite, Kaku Tatakeri (Light Novel)

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GATE: Jieitai Kanochi nite, Kaku Tatakeri (Light Novel)

GATE: Jieitai Kanochi nite, Kaku Tatakeri (Light Novel)

A gate appears in Tokyo's Ginza district sometime in the 21st century. From the gate pours out monsters, knights from middle-age Europe, and other fantasy-like beings, and they kill many of the citizens of Tokyo. This event is known as the Ginza Incident. The government sends a small group of soldiers from the Japanese Self-Defense Forces (a replacement for Japan's military) to the alternate world beyond the gate. Led by otaku soldier Youji, they find that the villages in the world are being attacked by a dragon. An elf girl who is a survivor from the dragon's rampage joins the group in their travels across the dangerous new world.

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Altina the Sword Princess

Altina the Sword Princess

Regis Ulrich is an incapable soldier; bad at both sword and archery, who passes the time by only reading books. While transferring to a remote region post, he meets a girl who turns out be the red hair and crimson eyed princess Altina, the wielder of the Supreme Ruler's Sword. Despite being only fourteen years old, she was appointed to become the commander of the army in the remote region simply because she was the illegitimate child of the Emperor. However, she continues to hold onto her dreams of becoming Empress despite the circumstances that surrounds her. To achieve this goal, she asks Regis to become her tactician and stand alongside her against the obstacles they are sure to face.

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Fukushuu Kansuisha no Jinsei Nishuume Isekaitan

Fukushuu Kansuisha no Jinsei Nishuume Isekaitan

Kousuke Kurono was an Avenger. After being raped, his beloved little sister was left out in the cold and froze to death. From the time he was 13-years old, Kousuke made use of any possible means in order to exact his revenge. 5 years had passed, he achieved his revenge, but having lived solely for the sake of revenge, at the moment his revenge came to fruition, afterwards he couldn’t muster up the willpower to live on. That’s why, with the same knife he used to kill the culprit, he slit his own throat. However, he then heard a voice; “Is that not wasteful?”. When he came to, he found not his home, his country, nor his world——It was another world. 

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Youjo Senki: Saga of Tanya the Evil

Youjo Senki: Saga of Tanya the Evil

When the average Japanese salaryman is suddenly thrown into in a world wracked with warfare and hardship by a supernatural power, they might first think to hide or run away. But not Tanya Degurechaff. A calculating and utilitarian man has been reborn as a child soldier. This young girl will do anything to rise in rank and find a way to live a life of comfort, and woe to any king, country, or god who stands in her way.

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The Economics of Prophecy (Light Novel)

The Economics of Prophecy (Light Novel)

The Oracle Princess Alfina suddenly announces an ominous prophecy to the people of the Kingdom of Crownheight. However, shunned as she is for being a descendant of rebel blood, her words are heeded by no one. On the other hand, Ricardo, the adopted heir of a peddler, who also happens to be an economics department graduate reincarnated into this world, attends the Royal Academy to study as a merchant. During an argument with a much more affluent merchant, the one to stick up for him is none other than Alfina. As the distance between them rapidly closes, Ricardo makes full use of his modern knowledge of science, mathematics and economics to stand against the unknown disaster of prophecy!

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Altina the Sword Princess (Light Novel)

Altina the Sword Princess (Light Novel)

Inept with a sword, unable to ride a horse, and apathetic toward the empire he serves, Regis Aurick is a hopeless soldier who spends his days buried in books. Banished to the borderlands, he encounters a stirring young woman with red hair and ruby eyes. She is Fourth Princess Marie Quatre Argentina de Belgaria, known simply to Regis as Altina. “…Do you want to become my tactician or not?” Having sought him for his rumored strategic prowess, she aspires to reform an empire led by self-seeking nobles and driven to pointless wars, the legendary blade of an emperor, the Grand Tonnerre Quatre, at her hip. Continuously underestimated by her regiment, including her would-be tactician, the princess resolves to prove her worth beyond a shadow of a doubt—no matter the risk. Here is a tale of war, love, and politics, woven by the bookworm and the sword princess.

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How a Realist Hero Rebuilt the Kingdom

How a Realist Hero Rebuilt the Kingdom

"O, Hero!" With that cliched line, Kazuya Souma found himself summoned to another world and his adventure--did not begin. After he presents his plan to strengthen the country economically and militarily, the king cedes the throne to him and Souma finds himself saddled with ruling the nation! What's more, he's betrothed to the king's daughter now...?! In order to get the country back on its feet, Souma calls the wise, the talented, and the gifted to his side. Five people gather before the newly crowned Souma. Just what are the many talents and abilities they possess...?! What path will his outlook as a realist take Souma and the people of his country down? 

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Isekai Demo Bunan ni Ikitai Shoukougun

Isekai Demo Bunan ni Ikitai Shoukougun

"Understanding" is stronger than a sword! There is no magic without weapons! But, this is the story of a man who wishes to live safely! A man stands alone on a mountain full of plants and creatures that he never knew nor saw before. He goes down the mountain by avoiding encounters with bears, slimes and bandits, and is hauled into prison the second he reaches a large city. On top of that, a pretty female knight called Illias manages to break him out and whisks him away to a church. What would a female knight need with a yellow-bellied pacifist? And when will this hair-raising day end already?!

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